TUNGSTEN SULFIDE
Synonym(s):Tungsten disulfide;Tungsten sulfide;Tungsten sulphide;Tungsten(IV) sulfide;WS2 flakes
- CAS NO.：12138-09-9
- Empirical Formula: S2W
- Molecular Weight: 247.97
- MDL number: MFCD00011467
- EINECS: 235-243-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-08-28 13:53:27
What is TUNGSTEN SULFIDE?
Description
Few-layer?tungsten disulfide (WS2) film has a 2D-layered structure with a narrow indirect bandgap of of 1.35 eV. In contrast, the monolayer film possesses a direct bandgap of 2.1 eV.
What are the applications of Application
Due to its distinctive electron configuration and high specific surface area, few-layer tungsten disulfide nanosheets have potential applications in electrodes and energy storage devices, supercapacitors, and photoelectrochemical cells as a catalyst for hydrogen evolution reactions (HERs). With?tunable electromagnetic absorption, it has practical applications?against electromagnetic pollution. WS2?is also a great potential candidate in photothermal therapy for the ablation of cancer cells, when NIR light is absorbed and converted into heat.
Synthesis
High-quality tungsten disulfide monolayer?films?are grown directly on the substrates (sapphire) by? the chemical vapour deposition (CVD) method.
Preparation
Synthetic?- Chemical Vapour Transport (CVT)
Chemical properties
Grayish-black solid. Mp above 1480C, can lubricate at temperatures above 2400F (1316C). Attacked by fluorine and hot sulfuric and hydrogen fluoride.
The Uses of TUNGSTEN SULFIDE
Tungsten sulfide is used as a component of catalysts for hydrotreating of crude oil, hydrodesulfurization and hydrodenitrification reactions. It finds application as solid-state secondary lithium battery cathodes and other electrochemical devices. It is found that it forms inorganic nanotubes, which is better reinforcing agents than carbon nanotubes. Tungsten sulfide addition to epoxy resin improves adhesion, fracture toughness and strain energy release rate.
The Uses of TUNGSTEN SULFIDE
Tungsten disulfide (WS2) is used as a solid lubricant that can withstand high temperatures. It is also used as a spray lubricant.
The Uses of TUNGSTEN SULFIDE
Tungsten sulfide possesses a pseudo 2 dimensional structure with applications in the Petrochemical industry as a desulfurization catalyst. Tungsten Sulfide nanoparticles have drawn research interest due to their potential in solid-state lubricants; coatings and photocatalysts.
What are the applications of Application
Tungsten(IV) sulfide is a component of catalysts and batteries
Definition
ChEBI: Tungsten disulfide is a sulfide salt.
Flammability and Explosibility
Not classified
Properties of TUNGSTEN SULFIDE
| Melting point: | 1480 °C |
| Density | 7.5 g/mL at 25 °C(lit.) |
| RTECS | YO7716000 |
| solubility | insoluble in H2O, HCl, alkaline solutions |
| form | powder |
| Specific Gravity | 7.5 |
| color | Dark gray |
| Water Solubility | Slightly soluble in water. |
| Exposure limits | ACGIH: TWA 3 mg/m3 NIOSH: TWA 5 mg/m3; STEL 10 mg/m3 |
| CAS DataBase Reference | 12138-09-9(CAS DataBase Reference) |
| EPA Substance Registry System | Tungsten sulfide (WS2) (12138-09-9) |
| Bandgap | 1.4 - 2.01 eV |
| Electronic properties | 2D semiconductor |
Safety information for TUNGSTEN SULFIDE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for TUNGSTEN SULFIDE
Abamectin manufacturer
Sajan Overseas Pvt Ltd
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